Biology (Combined Science) · IGCSE · Edexcel · Pearson Edexcel International GCSE Science (Double Award) — Biology (Linear) — 4SD0 · Specification point · 4.9 · Ecology and the environment · Feeding relationships
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| Students should: |
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4.9 understand why only about 10 per cent of energy is transferred from one trophic level to the next |